Preheat the oven to 180ºC, and prepare the baking trays with parchment paper.
Mix the flour, sugar, butter, and salt.
Mix the egg yolks and vanilla. Add the flour mixture to make the dough.
Transfer the dough to a flat, floured surface and shape with your hands until a ball of dough forms.
With a floured rolling pin, flatten the dough.
Cut the cookies into rectangles and use a toothpick to make a line in the center.
With your fingers, make holes in each side of the domino piece according to how many you want to add.
Transfer the cookies to the baking tray and place in the oven for 10 minutes. (Cooking time depends on the thickness of the cookies, it is important to watch them so they do not burn).
Melt the chocolate in a double boiler and when the cookies are ready, add a little chocolate to the holes to simulate the domino piece.
Nutritional Information
* * Information per 100g serving, percentage of daily values based on a 2,000 calorie diet.
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